Electronic Brake Systems for Motorcycles
Stability when braking is more important for motorcyclists than short stopping distance
As with cars, the primary objective when a motorcycle performs an emergency stop is to ensure that the vehicle remains stable.
With cars, the aim is to retain steering control; but a locked-up wheel on a motorcycle will almost inevitably lead to a fall. So, sensors on the front and rear wheels calculate the speed at which the wheels are still turning while braking force is being applied and check whether a lock-up is imminent. In the latter case, the control unit will reduce the brake pressure to prevent lock-up and loss of stability and road adhesion.
A rear wheel lift-off protection system (RLP) is also available to motorcycle manufacturers as an option in addition to the basic MAB. RLP is able to detect even more sensitively – by employing, for example, a brake pressure sensor which automatically analyzes the hydraulic pressure in the braking system – whether the rear wheel is about to lift off during hard braking. In this case, the pressure in the front brake circuit is slightly reduced until the motorcycle has regained its stability.
The MAB's compact dimensions and light weight make it easier to integrate or "package" into the motorcycle's design. If the ABS unit only takes up a small amount of installation space, less adjustment is needed to the motorcycle's existing structures, to its frame, fuel tank or fairings. Size is therefore a decisive competitive criterion in addition to price – even more so with motorcycles than with cars because there is considerably less space available.
For all motorcycles over 125 cubic centimeters ABS will become mandatory Europe-wide. This regulation is effective for all new type-approved motorcycles from 2016 and for all new motorcycles from 2017.
The One-Channel ABS for smaller motorcycle and scooters prevents the front wheels locking up when braking, thus reducing the driver’s risk of having an accident.
Motorcycle Integral Brake Systems (MIB)
With the MIB system, both wheels can be used for braking, although the driver only activates one brake. The system recognizes the request of the driver to brake and actively builds up pressure on the other brake circuit, which results in both wheels being activated for braking.
Motorcycle Anti-lock Brake System (MAB)
The MAB offers improved braking control and thus greater driving safety thanks to optimum braking. The MAB’s compact dimensions and light weight make it easier to integrate or "package" into the motorcycle’s design. If the ABS unit only takes up a small amount of installation space, less adjustment is needed to the motorcycle’s existing structures, to its frame, fuel tank or fairings.
Continental is developing miniMAB for small and recreational motorcycles. This new miniMAB is small, light and can be easily applied to various motorcycles. In the event of a panic brake by the driver, the ABS control on the front wheel can save the driver from falling. The series production for the one-channel ABS is planned for the year 2014.
Extended Control Functions:
Rear-wheel Lift-off Protection (RLP)
Both systems can support the Rear-Wheel Lift-off Protection (RLP) functionality. It prevents lift-off of the rear wheel. In addition, the RLP function prevents the motorcycle from somersaulting through countermeasures such as moderate pressure modulation in the front brake.
Motorcycle Hold & Go (MHG)
Supports the motorcyclist actively in a driving-off situation on a inclining roads